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I guessed the crown was not original by the way, it seems to small. Woud you suggest that I try to find a more autentic looking to replace it with or should I let it be?

Thank you all very much for offering your opinions! It麓s hard to get decent pics. Some new attempts below.
I have used it a bit and it works very well. But I guess a service is a good idea.
I am sure the condition isn麓t the best, it has porbably been used a lot before it ended up with me.
Thanks again for your comments, I value them greatly.